Koalas are a small, passive mob that make their appearance in MCUE
Koalas are small grey bear like marsupials that appear in the game. They usually hang out in trees and do not move much.
Koalas can sometimes be found hanging in Eucalyptus Trees in the Outback Biomes. Just like with sloths, if you grow a eucalyptus tree in an outback biome, it may spawn with a Koala in it.